[Bug 54089] [SNB regression] Power consumption goes postal after resume

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=54089

--- Comment #72 from Konstantin Khlebnikov <koct9i at gmail.com> ---
Seems like this one helps, but I need more time to be sure.

--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3607,6 +3607,8 @@ static void gen6_init_clock_gating(struct drm_device
*dev)
        int pipe;
        uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;

+       gen6_gt_force_wake_get(dev_priv);
+
        I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);

        I915_WRITE(ILK_DISPLAY_CHICKEN2,
@@ -3695,6 +3697,8 @@ static void gen6_init_clock_gating(struct drm_device
*dev)
        cpt_init_clock_gating(dev);

        gen6_check_mch_setup(dev);
+
+       gen6_gt_force_wake_put(dev_priv);
 }

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